Centrifugal extractor



Dec.v 23, 1941. H. 5. SCHWARZ 2,266,911

CENTRIFGAL -EXTRACTOR Original Filed May 25, 1955 2, Sheets-Sheet l M Imm w Y /f A l l QV# f4 l 1 l IJ 7 i r A k /2 :t E 4- 4| j r g 4f* N 'INVENTOR 'cw/fwz Dec. 23, 1941.

H. G. SCHWARZ CENTRIFUGAL EXTRACTOR 2 sheets-sheet 2 Original Filed May 25, 1935 y INVENTR. l /Zf/Yar 6 52W/Wiz- /Mdxgomm .ma O O Patented ec. 23, 1941 STATE orric I CENTRIFUGAL EXTRACTOR. Henry G. Schwarz, Denver, Colo., assign'or'to The Schwarz Engineering Company,

Inc., San

Francisco, Calif., a corporation of Nev Original application May 25, 1935, Serial No. 23,411. Divided and this application May 16, 1936, Serial.No. 81,487. Renewed June 2l,

4 Claims.

This invention relates to acentrifugal juice extractor, and while more particularly designed for extracting fruit juice, -it is, of course, not limited to this particular use,-but will be found valuable wherever it is desired'to break up, shred, and extract and juice from any liquid laden solid material.

The principal object ofthe invention is to. pro-I I vide an extractor whichwill be continuous and automatic in its operation; which will have an exceedingly large capacity with a minimum of size and minimum power consumption; which can be minutely and easily adjusted to obtain a maximum extraction from any given product;- and which will be economical to manufacture and service.

The invention relates more particularly to the type of extractor shown in applicants eopending application, Serial No. 23,411, led May 25, 1935,

which has issued as Patent No. 2,054,342, of which this application is a division.

Another object is to provide a machine of this type which progressively tear open and break down the structure and cells ofthe solid material and expelthe liquids such as moisture, juices, oils, fats, etc., asthe `material progresses on its Way from the inlet to the discharge. l

Still another object 'of the invention is to so construct the device that a.' classiication or separation of the extracted juices may be had if desired.

A further object is to eliminate all frlctional contacts, reciprocatingmotions, etc., and to provide al machine having only one moving unit so that a long life and freedom from repairs is assured.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and eiiciency. These will become more apparent from the following description. f

.In the following detailed description of the invention reference is had to' the ,accompanyingdrawings which forma part hereof. Like numerals referto like parts in all views of the drawings and throughout the description.

In the drawings: Fig. 1 is a` verticalsection through the improved extractor.

Fig. 2 is a fragmentary detail section through the screen ring.

Fig, 3 is a horizontal section-taken on the line 3 3, Fig. 1.

Fig. 4 is a similar section, taken on the line Fig. 5 ris a similar section taken on the line Fig. 6 is a detail section through the screen bell, taken on the line 6'S."Fig. 1.

The principle embodied in this machine could be carried out with various mechanical constructions. The drawings illustrate one embodiment which has proven very satisfactory. v The machine illustrated comprises a base casting I0 upon which rests a cylindrical housing Il.

An extracting cylinder I2 is supported on the housing I0 which in turn supports a head casting I3. A vertical shaft I4 extends between a bearing l5 in the head casting I3 and a second bearing I6 in the base lli. The weight of the shaft n is supportedy on a thrust bearing vIl which can be vertically adjusted by means of a pressure screw IB.

The base IQ is formed with a peripheral juice channel I9 fromwhich one or more juicedischarge pipes 20 lead. The mid portion of the base is open for the discharge of pulp therethrough. The pulp discharge and the juice channelis divided by an inwardly inclined inner wall' 33. The housing II is formed with an inclined or conical inner wall 2| leading downwardly and outwardly to the juicechannel I9. The head casting I3 is provided with a feed chute or hopper 22 through which the material is fed to the machine.

'I'he shaft I4 carries one or more star wheels the second star wheel. 'I'his screen is carried in v a removable screen ring 21 set into the cylinder Iz. The screen ring 21 is illustrated in detail in Fig. 2, and is formed with a series of vertical ribs 28 on its inner surface which support the screen and form vertical juice channels behind the screen which open through discharge openings 29 at the bottom.' Below the openings 29 in the ring 2l terminates a conical series of teeth so.

A spreader cap 3l surrounds the shaft I4 below the star wheels 23 and covers a bladed shredding cone32 which is keyed to the shaft It.

The top of the cap 8l is formed with a series juice extraction is made.

` sages 31 tothe channel I9.

from'the openings 29 associated with the-uppery oi' inclined blades 39v of various heights. The cone 32 is formed with outwardly extending blades 33, about which a conical extracting screen 34 is secured. A conical bell 35 surrounds the screen 34. 'I'he bell is secured to the ribs 33 of 'the cone 32 by means of suitable cap screws 48 (see Fig. 6) so as to rotate therewith and is provided with a series of inwardly extending ribs 36 which divide the space between the screen and the inner wall of the bell into a series of vertical fluid channels which discharge at the bottom through passages 31. y

aaeaeii acts as a retarder to prevent a too rapid move- 4 ment of the material through the machine. On

The shaft I4 is driven at relatively high speed in any suitable manner. As illustrated, the shaft terminates in a coupling 40 which can be connected to a motor shaft or any other suitable driving device. A supporting bracket 44 is provided for supporting the driving motor, variable speed mechanism, or other drive mechanism. This bracket is mounted on an annular flange 45 extending about the casting The flange is provided with a series of holes 46,- as illustrated,

so that the supporting bracket 44 may be posi-V tioned at any desired point to accommodate any given installation.

The-material to be extracted is fed into ithe hopper 22, onto the star wheels 23. The blades 23 chop and reduce the material to small pieces. These pieces are thrown by centrifugal force against the teeth 25 of the shredding ring 24 where they are ground and chopped bythe blades. This shredded and chopped material then moves downward and is thrown, pressed and rubbed against the cylindrical screen 26, Where the rst The uid exudes through the screen 26 into the fluid chambers in the sgeen ring 21 and flows through the openings The material is gradually worked by gravityv and by the incline of the rotating blades downwardly along the screen 26, to the top of the cap The blades 39 on the cap press the material outwardly and downwardly against the second series of shredding teeth 30 where a still finer shredding or grinding operation is accomplished before the material is picked up by the blades 33 between the cone 32 and the conicalscreen 34.

The centrifugal force at thispoint presses the final shredded material against the screen 34 and extracts the remaining iiuid therefrom. The

fluid flows into the passages on the inner surface of the bell 35 and from thence through the pas- The fluid flowing screen fails onto the rotating bell 35 and is thrown against the inner conical wall 2| from where it iiows to the collecting channel |9.

The solid material of pulp works downwardly along the screen due to the incline thereof and the centrifugal action and is thrown through the hollow center of the base casting I0. The lower cal member, screen. cap, and-bell. rotating as a l A separating plate 4| is illustrated between the lower star wheel 23 andthe cap 3|. This plate some materials, this'plate would be needed and on others an additional plate could be placed between two star wheels to still further retard the material. i i

If an additional extracting .action and shredding is desired, a secondcylinder i2 could be positioned above the first so a's to 'give still additional shredding and squeezing action Ato the material.

It is desired to call attention lto the fact thaty the material is first subjected to a grinding and squeezing against a stationary screen and thence to a pure centrifugal extraction againsta rotating screen. In some installations, the lowerrotating assembly of the4 cone 32, the screen 34, and the bell 35 may not be needed as lthe entire Vextraction. may be accomplished through the'screen 26. In other installations the stationary screen 26 could be eliminated and the entire 'extraction done,

through the screen 34. The sectional construction admits of many changes and variations. If desired, the Huid flowing from the upper screen through' the openings 29 may be collected separately from the iiuid extracted by the lower screen 34.

The upper extremities of the ribs or blades 33 are curved sharply forward to pick up the material discharging from the teeth 30 and force it downwardly into the conical 'screen 34.

For'some materials, lthe shredding portion of the machine 24 and 30 would not be required, and

.' could be eliminated. The latter would'be true.

for materials not requiring shredding or maceration, such as i'lne granular material 'requiring dewatering, for instance sugar, ores, etc., or for sewerage.

While a .specific form of the improvement has been described and illustrated herein.. it is desired `to be understood-that the same may be varied, `within the scope of the appended claims, without departing from the spirit of the invention.

I use, the word juice or its derivatives in the appended claims in a generic sense to include' water, oil and'other liquids, as well as those commonly called juices.

Having thus described the invention, what is claimed and desired secured by Letters Patent is:

1. In a juice extractor, a vertical shaft; a conical member secured to' said shaft; blades' extending outwardly from said conical member to formi a conical supporting surface; a vconical screen' supported by said blades; a conical bell surrounding said screen in spaced relation therefrom, said bell rotating with said screen; means for introducing material between said conical member and said screen; and means for discharging juice from between said bell and said screen.- y

2. In a juice extractor, a vertical shaft; a con ical member secured to said-shaft; blades extending outwardly from said conicalmember to form a conical supporting surface a conical s'creen supported by said blades; a conical bell surrounding said screen in spaced relation therefrom, said bell rotating with said screen; a conical cap'over said conical member to direct material between' said conical member. and said screen; and means for discharging juice through said bell. said coniunit.

3. In a'juic'e extractor of the class described.y

the combination oija vertical shaft; an inverted cup-like member axially secured on `said shaft;

r ascesi;

ribs projecting` outwardly from said cup-like member; an annular screen. surrounding said member and spaced therefromby said ribs;- an

annular bell surrounding said screen; and inwardly extending members on "said bell to vhold4 the latter spaced from said screen, all of said ele ments rotating as a unit with said shaft.

j 4. In a juice extractor of the .class described.

v the combination'of a vertical shaft; an inverted cup-like member axially secured-on said shaft;

ribs. projecting outwardly from `said cup-like member; an annularA screen surrounding said member and said screen-adjacent the top thereof,

and there being passages through said bell adjacent the bottom thereof.y for the exit yofjuce therefrom. I

' mi? G.

member and spaced therefrom by said ribs; an 

